package com.sky.service.impl;

import ch.qos.logback.core.status.Status;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品和对赢口味表
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {

//    插入一条数据
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);
        //获取insert语句生成的主键值
        Long dishId=dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors !=null && flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //像口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }
    /**
    * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 菜品批量删除
     * 思路二，可以用list把id和status取出之后进行判断，减少数据库访问次数
     * @param ids
     */
    @Transactional
    @Override
    public void deleteBatch(List<Long> ids) {
        //判断菜品能不能删除 是否起售中
        for (Long id : ids) {
            Dish dish=dishMapper.getById(id);
            if(dish.getStatus().equals( StatusConstant.ENABLE)){
                //判断是否起售
                throw  new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断菜品有没有关联的套餐
        List<Long> setmealIdsByDishIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIdsByDishIds !=null&&setmealIdsByDishIds.size()>0){
            throw  new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中的菜品
       /* for (Long id : ids) {
            dishMapper.deleteById(id);
            //删除菜品关联的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }

        */
        //根据裁判集合批量删除菜品数据
        dishMapper.deleteByIds(ids);
        //删除口味相关数据
        dishFlavorMapper.deleteByDishIds(ids);

    }
    /**
     *根据id查询菜品和对应口味数据
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish =dishMapper.getById(id);
        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors=dishFlavorMapper.getByDishId(id);
        //封装数据
        DishVO dishVO=new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }
    /**
     *修改菜品
     * @return
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //修改菜品基本表
        dishMapper.update(dish);
        //删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //重新插入口味数据
        List<DishFlavor> flavors=dishDTO.getFlavors();
        if(flavors !=null && flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //像口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 根据分类id查询菜品
     */
    @Override
    public List<Dish> getBycategoryId(Long categoryId) {
        //根据分类id查询菜品数据
        Dish dish =Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();

        return dishMapper.getBycategoryId(dish);
    }
    /**
     * 菜品起售停售
     * @param status
     * @param id
     * @return
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish =Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);
    }
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.getBycategoryId(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
